🧩 词语组成解析
ghetto
['getəu]
n. 少数民族的集中住宅区;犹太人区;限制区，分离区;贫民区;
upgrade
[,ʌp'ɡred]
n. 向上的斜坡;
vt. 提升;使（机器、计算机系统等）升级;提高（设施、服务等的）档次;提高（飞机乘客、旅馆住客等）的待遇;
up向上+grade步，级→向上升级→上升，升级
🗣️ 情景例句
Oh, it's a quarter to four,
噢 ，差十五分就四点了，
The two parties involved in a contract have the obligation to execute the contract.
合同双方有义务履行合同。
easily obtainable from the lunar rocks in the form of liquid oxygen.
从月球上的岩石中很容易提炼出液态氧，